Related Pages: Field ValidationEmpty States
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Description
System errors occur when the application encounters a problem, such as with authentication or server communication.
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Types
This full list of HTTP status codes shows all of the potential server request response codes.
LUX has specific designs for the 4 5 most common system errors, plus an additional generic design for rarer instances.
Type | Usage | Illustration | Icon | Full page request (HTTP) | Partial page request (AJAX) |
Bad, missing, or expired token, causing an authentication failure (e.g login has timed out). | N/A - redirect | N/A - redirect | Redirect to Login page. | Redirect to Login page. | |
The user does not have permission to access a resource (e.g an administrator-only page). |
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 Render the LUX frame, including the VerinTop. |
 Render the permitted areas of the interface. |
Page or resource not found. Use when a URL or API is called that the server finds no page or resource for. |
 | N/A |  The full page should be replaced by the error message. |
Do not render the LUX frame. |
 Render the LUX frame, including the VerinTop. | |||||
Resource is unavailable at that time because there is a load on the network or service. |  |  |  The full page should be replaced by the error message. |  Render the permitted areas of the interface. |
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Service is not responsive or denies access. |  |  |  The full page should be replaced by the error message. |  Render the permitted areas of the interface. | |
Server infrastructure errors. Use when the server is unable to respond for various reasons. |  |
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 The full page should be replaced by the error message. |
 The full page should be replaced by the error message. |
Generic | Catch all. Use when none of the system errors above are suitable. |  |
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 The full page should be replaced by the error message. |
 Render the LUX frame, including the VerinTop. |
Usage & Behavior
General Guidelines
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an illustration which visualises and contextualises the error.
a title which describes the basic nature of the error. This may also contain the error code.
a description that provides more detail on why the error has occurred.
action options such as Back or Retry, to help the user recover from the error state. (Optional).
Example:
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Placement and Positioning
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Minimise the potential for system errors.
Do not show links or options which the user does not have authorisation for.
When a resource expires or is deleted, the original URL should redirect to its replacement or a new resource, where possible.
Accessibility Compliance
Unless otherwise specified, see our general compliance information in Fundamentals - Accessibility.
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Design
Code
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